It is going to rain. / It’s about to rain.

快要下雨了。

It is going to rain.

天要下雨了。

It doesn't seem as if it is going to rain.

好像天不会下雨。

It is going to rain. Take an umbrella with you.

带一把伞去。看样子就要下雨了。 。

Itas though it is going to rain this afternoon.

看起来今天下午要下雨了.

E. g. It looks as if it is going to rain this afternoon.

看来好像今天下午会下雨。

Eg. Look! There come the dark clouds. It is going to rain.

瞧！乌云密集，天要下雨。

The dark cloud in the sky suggests that it is going to rain.

你看见了那些盘旋在地球上空的乌云了吗？

Jonas: Yeah, I suppose we could do that. But remember it is going to rain later.

乔纳斯：是的，我想我们可以这样做。但记住，以后会下雨的。